he is in custody at the u.s. marine brig in quantico virginia where he is confined to his cell 23 hours a day under what's called a prevention of injury watch. last week, there was a change in his imprisonment-- manning was stripped of his clothing at night. manning's attorney, david coombs, has reported the brigs action followed his clients complaint that the so-called prevention of injury restrictions on him were absurd. bradley said if he wanted to harm himself he could do so with the elastic waistband of his underwear. in an exclusive "frontline" interview this week with correspondent martin smith, bradley manning's father, brian manning, talked for the first time about his son's incarceration. >> reporter: you decided that you wanted to sit down and talk today because you want to complain, publicly about the conditions of his imprisonment. >> yes. >> reporter: and those conditions are? >> well, he's being-- his clothing is being taken away from him, and he's being humiliated by having to stand at attention i